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Re: Virus emails

Op di 23-09-2003, om 01:48 schreef Gunnar Wolf:
> Mike Hommey dijo [Tue, Sep 23, 2003 at 12:28:44AM +0200]:
> > > > helps catching 95%... But the bandwidth is still used... I'm still
> > > > looking for a pure MTA solution...
> > >
> > > A pure MTA solution would still need to scan the body and thus would still
> > > eat your bandwidth.
> > 
> > Maybe I'm wrong, but I think an MTA rejecting a mail because of oversized body 
> > doesn't have to get the whole body before rejecting the mail. Based on this, 
> > it should be possible to reject the mail before it gets fully transfered to 
> > the server.
> I don't think so - And if so, this could break many client MTAs.
> According to the protocol definition [1], 


> [1] http://www.ietf.org/rfc/rfc0821.txt

MTAs that still stick to nothing but RFC821 are horribly outdated
nowadays. Modern MTAs support the ESMTP SIZE command, which should take
care of this problem.

Of course, that assumes the other end isn't lying, which probably is an
incorrect assumption...

Wouter Verhelst
Debian GNU/Linux -- http://www.debian.org
Nederlandstalige Linux-documentatie -- http://nl.linux.org
"Stop breathing down my neck." "My breathing is merely a simulation."
"So is my neck, stop it anyway!"
  -- Voyager's EMH versus the Prometheus' EMH, stardate 51462.

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